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Cache FID to avoid multiple disk reads. #1571

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Merged
merged 2 commits into from
May 20, 2020
Merged

Cache FID to avoid multiple disk reads. #1571

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1d8aa16
Cache FID to avoid multiple disk reads.
ankitaj224 May 18, 2020
3c974c4
Addressing Rayo's comments.
ankitaj224 May 19, 2020
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12 changes: 10 additions & 2 deletions ...-installations/src/main/java/com/google/firebase/installations/FirebaseInstallations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,8 @@ public class FirebaseInstallations implements FirebaseInstallationsApi {
private final ExecutorService backgroundExecutor;
private final ExecutorService networkExecutor;

private String cachedFid = null;

@GuardedBy("lock")
private final List<StateListener> listeners = new ArrayList<>();

Expand Down Expand Up @@ -215,7 +217,11 @@ String getName() {
public Task<String> getId() {
preConditionChecks();
TaskCompletionSource<String> taskCompletionSource = new TaskCompletionSource<>();
taskCompletionSource.trySetResult(doGetId());
if (cachedFid != null) {
taskCompletionSource.trySetResult(cachedFid);
} else {
taskCompletionSource.trySetResult(doGetId());
}
return taskCompletionSource.getTask();
}

Expand Down Expand Up @@ -454,6 +460,7 @@ private PersistedInstallationEntry registerFidWithServer(PersistedInstallationEn

switch (response.getResponseCode()) {
case OK:
cachedFid = response.getFid();
return prefs.withRegisteredFid(
response.getFid(),
response.getRefreshToken(),
Expand Down Expand Up @@ -493,6 +500,7 @@ private PersistedInstallationEntry fetchAuthTokenFromServer(
case AUTH_ERROR:
// The the server refused to generate a new auth token due to bad credentials, clear the
// FID to force the generation of a new one.
cachedFid = null;
return prefs.withNoGeneratedFid();
default:
throw new IOException();
Expand All @@ -519,7 +527,7 @@ private Void deleteFirebaseInstallationId() throws FirebaseInstallationsExceptio
"Failed to delete a Firebase Installation.", Status.BAD_CONFIG);
}
}

cachedFid = null;
insertOrUpdatePrefs(entry.withNoGeneratedFid());
return null;
}
Expand Down